Sir,

We thank Mr Chung for his interest in our article on iris reconstruction implants.1 We agree that the types 50 D and 50 E have been incorrectly labelled.

The reason for choosing 50 C implants in case 2 was to provide a ‘good’ pupil size postoperatively for a detailed retinal examination. In our experience, we have found that patients with ocular trauma not only present with anterior segment injuries but also have traumatic retinal dialysis/detachments, which require adequate pupillary aperture size for the retinal surgeon to work with.

Choosing an implant model in eyes with these kinds of extensive injuries is a trade-off between obtaining a reasonable cosmetic appearance and achieving a pupil size, which does not interfere with performing a detailed retinal exam.